CN106356022A - Control device and method used for display screen - Google Patents
Control device and method used for display screen Download PDFInfo
- Publication number
- CN106356022A CN106356022A CN201610917592.2A CN201610917592A CN106356022A CN 106356022 A CN106356022 A CN 106356022A CN 201610917592 A CN201610917592 A CN 201610917592A CN 106356022 A CN106356022 A CN 106356022A
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- China
- Prior art keywords
- module
- dot matrix
- display screen
- resistance
- chip computer
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Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
Abstract
The invention discloses a control device and a method used for a display screen. The control device comprises a single chip module, a dot-matrix display module connected with the single chip module, a non dot-matrix display module connected with the single chip module, and an ambient light detection module connected with the single chip module, wherein one of the dot-matrix display module and the non dot-matrix display module is driven by the single chip module after selection. According to the invention, energy saving and power consumption reduction, the application of different hardware interfaces, different communication protocols and network, and wireless or wired application occasions are satisfied, so not only can the eight-word code LED screen be driven, but also the standard LED dot-matrix screen can be driven. The two driving software and hardware are combined initiatively, and the LED large-screen display driving and control of two quite different circuit structures are completed under the control of the same embedded ARM chip on the same control board.
Description
Technical field
The present invention relates to a kind of control device for display screen.
Background technology
Led dot matrix display screen is the large display screen integrating microelectric technique, computer technology, the information processing technology
System.It utilizes the lattice module of light emitting diode composition or pixel cell to form the display screen of variable area, with reliability
Height, long service life, strong environmental adaptability, the ratio of performance to price are high, the low feature of use cost, short about ten years in,
The main product shooting up as flat pannel display, is widely used in field of information display.It is high with its brightness, the life-span
Long, become the advantages of stable and reliable in work and ideal chose that outdoor study shows.
Although display content is enriched on led dot matrix screen, can display digit, text or figure simultaneously, due to
In the case of sample display word height, led (light emitting diode) quantity that dot matrix screen uses makes than the led of non-dot matrix screen (8 character code)
Quantity will how several times, and the led cost so not only having more is much higher, and display driver circuit cost also wants height very
Many, also much higher times of the consumption of electric energy, as long as so show the place of simply digital or a small amount of English alphabet at some
The use of 8 common character code led screens is very suitable, and economy.
Present dot matrix giant-screen panel can only drive the dot matrix screen of standard interface it is impossible to drive non-dot matrix to show
Screen, i.e. 8 character code display screen.Drive the panel of 8 character code led screens nor the dot matrix led screen driving standard interface in turn.Cause
Huge for both led display screen type of drive difference, not only show the differences such as scan mode, renewal frequency, data output, and
And the structure of drive circuit, running voltage are also usually different.
Dot matrix giant-screen only has rs232 or rs485 now, does not have the wireline interfaces such as can interface, Ethernet, does not more have
The wave points such as wifi, bluetooth.And present industrial applications get more and more and control data transmission using network, need handle
It is one of certain network node member that led display screen is treated as, but panel in the market is all that one-to-one control is aobvious
Show, be not suitable with the requirement of Web vector graphic.
Led screen display control board is all to send order to adjust brightness by main control device now, or at all not bright
Degree adjusting control function, rather than the intensity of led screen active detecting external environmental light, automatically according to environment adjusting display brightness
's.So not only make one to feel dazzling in dark environment, and waste electric energy, produce big calorimetric, reduce life of product and
Reliability.
Content of the invention
In view of this, the invention provides a kind of control device and method for display screen, adjust automatically according to environment
Display brightness, saves energy, improves life of product and reliability.
According to a purpose of the present invention, the present invention proposes a kind of the first technical scheme: control device for display screen, bag
The dot matrix display module include one-chip computer module, being connected with one-chip computer module, the non-dot matrix being connected with one-chip computer module are shown
Module and the ambient light detection module being connected with one-chip computer module, wherein dot matrix display module show mould with non-dot matrix
Block selects a driving by one-chip computer module.
Preferably, described one-chip computer module includes single-chip microcomputer and peripheral circuit, and wherein dot matrix and non-dot matrix shows mould
The control signal of block is multiplexing.
Preferably, described single-chip microcomputer is arm processor.
Preferably, the interface of described dot matrix display module includes the chip of 2 models 74hc245, and non-dot matrix shows
Show that module adopts mosfet pipe to drive as the position of common anode, and section drives and adopts Npn triode.
Preferably, described ambient light detection module include photoconductive resistance cds1, be connected with the port 1 of photoconductive resistance cds1 and
The vdd3.3 signal being connected with single-chip microcomputer, one end are connected with the port 2 of photoconductive resistance cds1 and the other end and connecing that the earth is connected
Ground resistance, one end be connected with the port 2 of photoconductive resistance cds1 and the connection resistance in parallel with earth resistance and be connected resistance
The ground capacity that the other end is connected, wherein connects the common connecting point of resistance and ground capacity and the light signal phase of single-chip microcomputer
Even.
Preferably, it also includes the interface module being connected with one-chip computer module, wherein interface module include rs232,
Rs485, can, Ethernet, wifi, bluetooth communication interface.
According to another object of the present invention, the present invention proposes a kind of the second technical scheme: control method for display screen,
Comprising:
The first step: judge whether selection signal is low level, if low level, one-chip computer module presses dot matrix display mould
The requirement output control signal of block and the corresponding dot matrix display screen of driving；If high level, one-chip computer module presses non-dot matrix
The requirement output control signal of display module and the non-dot matrix display screen of driving；The control of wherein dot matrix and non-dot matrix display module
Signal is multiplexing；
Second step: when ambient light is stronger, the output voltage of ambient light detection module is higher, otherwise lower；
3rd step: output voltage feeds back to one-chip computer module, one-chip computer module is adjusted display screen by way of pwm and drives
Average voltage, if ambient light is dark, just reduce this average voltage, otherwise just improve average voltage；
4th step: average voltage transports to display screen to terminating.
Preferably, described one-chip computer module is connected with radio interface module, and wherein this radio interface module is actively set up simultaneously
One wireless network of management, allows other same categories of device add this wireless network to work together.
Preferably, described one-chip computer module is connected with radio interface module, and wherein this radio interface module is a son section
Point, sets up a wireless network with other same categories of device.
Preferably, the interface of described dot matrix display module includes the chip of 2 models 74hc245, and non-dot matrix shows
Show that module adopts mosfet pipe to drive as the position of common anode, and section drives and adopts Npn triode；Described ambient light detection module bag
Include photoconductive resistance cds1, the vdd3.3 signal being connected with the port 1 of photoconductive resistance cds1 and being connected with single-chip microcomputer, one end with photosensitive
The port 2 of resistance cds1 is connected and the other end is connected with the port 2 of photoconductive resistance cds1 with the greatly earth resistance being connected, one end
And in parallel with earth resistance connect resistance and with is connected the ground capacity that the resistance other end is connected, wherein connection resistance with
The common connecting point of ground capacity is connected with the light signal of single-chip microcomputer.
Compared with prior art, advantages of the present invention is as follows:
Meet energy-saving, meet different hardware interface, different communications protocol and network application, meet wirelessly or non-wirelessly
The occasion of application, can drive 8 character code led screens can drive standard led dot matrix screen again, drive software and hardware knot by two kinds initiatively
Altogether, two kinds of diverse circuit structures are completed under the control of the same embedded arm chip on same panel
Led large screen display drive control.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Have technology description in required use accompanying drawing be briefly described it should be apparent that, drawings in the following description be only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, acceptable
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the schematic diagram of one-chip computer module in the present invention；
Fig. 2 is the schematic diagram of dot matrix display module in the present invention；
Fig. 3 is the schematic diagram of non-dot matrix display module in the present invention；
Fig. 4 is the schematic diagram of ambient light detection module of the present invention；
Fig. 5 is the schematic diagram of radio interface module in the present invention.
Specific embodiment
By specific embodiment, technical scheme will be clearly and completely described below.Obviously, retouched
The embodiment stated is only a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, this
The every other embodiment that field those of ordinary skill is obtained under the premise of not making creative work, broadly falls into the present invention
The scope of protection.
Refer to Fig. 1-5, the present invention provides a kind of control device for display screen, including one-chip computer module and monolithic
Machine module be connected dot matrix display module, the non-dot matrix display module being connected with one-chip computer module and with single-chip microcomputer mould
The ambient light detection module that block is connected.Display screen is preferably led display screen.
One-chip computer module includes single-chip microcomputer and peripheral circuit.Single-chip microcomputer is arm processor, is stm series.Dot matrix
The interface of display module includes the chip of 2 models 74hc245, and non-dot matrix display module adopts mosfet pipe as common anode
Position drive, the control signal of position is public with the control signal of dot matrix display module, and section drives and adopts Npn triode, and it is controlled
Signal processed is public with other signals of dot matrix that is to say, that dot matrix is to be multiplexed completely with the control signal of non-lattice display module
's.Ambient light detection module is included photoconductive resistance cds1, is connected with the port 1 of photoconductive resistance cds1 and is connected with single-chip microcomputer
Vdd3.3 signal, one end are connected with the port 2 of photoconductive resistance cds1 and the other end and the earth resistance r10 being greatly connected, one end
It is connected with the port 2 of photoconductive resistance cds1 and the connection resistance r9 in parallel with earth resistance r10 and another with being connected resistance r9
Ground capacity c017 that end is connected, wherein connects resistance r9 and the common connecting point of ground capacity c017 and the light of single-chip microcomputer
Signal is connected.
The present invention further includes the interface module being connected with one-chip computer module, wherein interface module include rs232,
The wired or wireless communication interface such as rs485, can, Ethernet, wifi, bluetooth, wherein radio interface module include wifi and bluetooth
Chip, as shown in figure 5, it can actively be set up and manage a wireless network, allows other same categories of device add this wireless network
To work together, without outside any wireless network；Other equipment can certainly be added to set up as a child node
A wireless network with management.Obtain the aobvious of dot matrix display module or non-dot matrix display module from there through interface module
Show content.
Single-chip microcomputer is carried out after conversion process to the display content obtaining, defeated by standard 08 interface of dot matrix display module
Deliver to control display driver circuit on the lamp plate of dot matrix display module, specify display mode and display location according to user
Display digit or picture and text, simultaneously single-chip microcomputer also can non-dot matrix display module be transported on the lamp plate of non-dot matrix display module
Control the light on and off of each led, specify display mode and display location to carry out the English alphabet of display digit or minority according to user.Single
Piece machine and then automatically adjusts the brightness of display screen by ambient light detection module come the light levels of environment-identification, monolithic simultaneously
Machine also can come automatically into display holding state according to whether receiving effective display content.Single-chip microcomputer passes through io On-off signal
The on-off model of external wireless or wired input can be accepted, and forwarded by various interface circuits after being processed by single-chip microcomputer
To main control device.
One-chip computer module detects cs_8led pin, if low level, one-chip computer module presses wanting of dot matrix display module
Seek the various control signals of output, drive corresponding dot matrix led display screen；If cs_8led is high level, one-chip computer module is pressed non-
The requirement of dot matrix display module exports various control signals, drives corresponding 8 character code led display screens；Wherein dot matrix and non-dots
The control signal of configuration display module is multiplexing, but drive circuit is different.When ambient light is stronger, ambient light detects mould
Output voltage in ground capacity c017 in block is higher；Otherwise lower, AD conversion unit is this voltage analog signal
Switch to digital quantity and tell one-chip computer module, the light levels of the environment residing for present display screen, the side by pwm for the one-chip computer module
Formula adjusts the average voltage that display screen drives, if ambient light is dark, just reduces this average voltage, thus reducing display screen
Display brightness, on the contrary just improve average voltage, improve the display brightness of display screen.
Certainly above-described embodiment only technology design to illustrate the invention and feature, its object is to allow and is familiar with technique
People will appreciate that present disclosure and implement according to this, can not be limited the scope of the invention with this.All according to this
Equivalent transformation or modification that the spirit of bright main technical schemes is done, all should be included within the scope of the present invention.
Claims (10)
1. a kind of control device for display screen is it is characterised in that include one-chip computer module, the point that is connected with one-chip computer module
Configuration display module, the non-dot matrix display module being connected with one-chip computer module and the ambient light being connected with one-chip computer module
Detection module, wherein dot matrix display module and non-dot matrix display module select a driving by one-chip computer module.
2. as claimed in claim 1 a kind of control device for display screen it is characterised in that: described one-chip computer module includes
Single-chip microcomputer and peripheral circuit, wherein dot matrix are multiplexings with the control signal of non-dot matrix display module.
3. as claimed in claim 2 a kind of control device for display screen it is characterised in that: described single-chip microcomputer for arm at
Reason device.
4. as claimed in claim 2 or claim 3 a kind of control device for display screen it is characterised in that: described dot matrix shows
The interface of module includes the chip of 2 models 74hc245, and non-dot matrix display module adopts mosfet pipe as the position of common anode
Drive, and section drives and adopts Npn triode.
5. as claimed in claim 4 a kind of control device for display screen it is characterised in that: described ambient light detection module
Vdd3.3 signal, one end and the light being connected including photoconductive resistance cds1, with the port 1 of photoconductive resistance cds1 and being connected with single-chip microcomputer
Port 2 phase of the port 2 of quick resistance cds1 is connected and the other end is connected with the earth earth resistance, one end and photoconductive resistance cds1
Even and in parallel with earth resistance connect resistance and with is connected the ground capacity that the resistance other end is connected, wherein connection resistance
It is connected with the light signal of single-chip microcomputer with the common connecting point of ground capacity.
6. a kind of control device for display screen as described in claim 1 or 2 or 3 is it is characterised in that also include and monolithic
The interface module that machine module is connected, wherein interface module include rs232, rs485, can, Ethernet, wifi, bluetooth communication connect
Mouthful.
7. a kind of control method for display screen it is characterised in that comprising:
The first step: judge whether selection signal is low level, if low level, one-chip computer module presses dot matrix display module
Require output control signal and drive corresponding dot matrix display screen；If high level, one-chip computer module is shown by non-dot matrix
The requirement output control signal of module and the non-dot matrix display screen of driving；The control signal of wherein dot matrix and non-dot matrix display module
It is multiplexing；
Second step: when ambient light is stronger, the output voltage of ambient light detection module is higher, otherwise lower；
3rd step: output voltage feeds back to one-chip computer module, one-chip computer module adjusts the flat of display screen driving by way of pwm
All voltage, if ambient light is dark, just reduces this average voltage, otherwise just improves average voltage；
4th step: average voltage transports to display screen to terminating.
8. as claimed in claim 7 a kind of control method for display screen it is characterised in that described one-chip computer module with no
Line Interface Module is connected, and wherein this radio interface module active is set up and managed a wireless network, allows other same categories of device to add
Enter this wireless network to work together.
9. as claimed in claim 7 a kind of control method for display screen it is characterised in that described one-chip computer module with no
Line Interface Module is connected, and wherein this radio interface module is a child node, sets up a wireless network with other same categories of device.
10. a kind of control method for display screen as described in claim 7 or 8 or 9 it is characterised in that: described dot matrix
The interface of display module includes the chip of 2 models 74hc245, and non-dot matrix display module adopts mosfet pipe as common anode
Position drive, and section drive adopt Npn triode；Described ambient light detection module includes photoconductive resistance cds1 and photoconductive resistance
The port 1 of cds1 is connected and the vdd3.3 signal being connected with single-chip microcomputer, one end are connected and another with the port 2 of photoconductive resistance cds1
The earth resistance that end is connected with the earth, one end are connected with the port 2 of photoconductive resistance cds1 and the connection in parallel with earth resistance electricity
Resistance and the ground capacity connected with being connected the resistance other end, the wherein common connecting point of connection resistance and ground capacity and list
The light signal of piece machine is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610917592.2A CN106356022A (en) | 2016-10-20 | 2016-10-20 | Control device and method used for display screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610917592.2A CN106356022A (en) | 2016-10-20 | 2016-10-20 | Control device and method used for display screen |
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| Publication Number | Publication Date |
|---|---|
| CN106356022A true CN106356022A (en) | 2017-01-25 |
Family
ID=57863474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610917592.2A Pending CN106356022A (en) | 2016-10-20 | 2016-10-20 | Control device and method used for display screen |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110689834A (en) * | 2019-09-20 | 2020-01-14 | 珠海格力电器股份有限公司 | Display interface control method and device, control equipment and electrical equipment |
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Application publication date: 20170125 |